01 — The tool
Equalize audio with five frequency bands
The free five-band Audio Equalizer from Loudness.ai changes the balance of frequencies in a recording. Adjust bands centered at 60 Hz, 250 Hz, 1 kHz, 4 kHz and 12 kHz to shape bass, lower mids, midrange, presence and high-frequency detail. The response graph shows the combined tone curve.
Use the sliders for individual changes or start with a Flat, Warm, Bright or Voice preset. Each band and the output gain can be adjusted from −12 to +12 dB. Prepare a preview and compare at a consistent playback level. For uneven volume between phrases, use the Audio Compressor rather than relying on tone controls.
02 — How it works
How to equalize audio online for free
Listen to the original
Open the recording and identify the tonal problem: heavy bass, a thick low-mid sound or a voice that needs more presence. Make the decision with headphones or speakers you know.
Adjust one band at a time
Choose a preset or move a band slider. Start with a small cut or boost, then check the graph. Lower output gain when several boosts raise the overall level.
Compare and export
Prepare the preview and switch between versions at the same passage. Listen to voices and louder sections, keep Prevent clipping enabled when appropriate, then export MP3 or WAV.
03 — Practical uses
Adjust tone in voice, music and practice recordings
Voice recordings
Reduce an overly heavy low end or try a modest presence adjustment to make speech easier to follow. Use the Audio Enhancer for continuous background noise that a broad tone adjustment cannot isolate.
Music and rehearsal audio
Balance bass, mids and highs when a recording sounds overly thick or dull. Check more than one passage so an adjustment that helps one instrument does not hide another.
Matching adjacent clips
Make a modest tonal adjustment when one narration take sounds darker than the next. Compare their voices at similar levels before arranging the clips with the Audio Joiner.
04 — Frequently asked questions
Audio Equalizer questions
What do the five equalizer bands control?
They cover low bass, lower mids, midrange, presence and high frequencies. Each band's gain changes a region around its center frequency. The response graph shows how those regions combine into the overall curve.
Should I boost or cut a band?
Listen for the problem before choosing. Cutting an excessive region can be more useful than boosting several others. Start with a small change and compare the original instead of choosing settings only from the graph.
Does equalizing audio remove background noise?
An equalizer changes frequency balance throughout the recording, including the voice or music. It can reduce an overly strong frequency region, but it is not a dedicated noise-removal tool.
Why does an EQ boost change the overall level?
Boosting a band adds level in that frequency region. Several boosts can raise peaks as well as perceived loudness. Use output gain to maintain a useful comparison level and check the preview before exporting.